421604063 has 4 divisors (see below), whose sum is σ = 446404320. Its totient is φ = 396803808.

The previous prime is 421603951. The next prime is 421604077. The reversal of 421604063 is 360406124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421604063 - 2²⁴ = 404826847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421604083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12400103 + ... + 12400136.

It is an arithmetic number, because the mean of its divisors is an integer number (111601080).

Almost surely, 2^421604063 is an apocalyptic number.

421604063 is a deficient number, since it is larger than the sum of its proper divisors (24800257).

421604063 is a wasteful number, since it uses less digits than its factorization.

421604063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24800256.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 421604063 is about 20532.9993668728. Note that the first 3 decimals coincide. The cubic root of 421604063 is about 749.8394103578.

Adding to 421604063 its sum of digits (26), we get a square (421604089 = 20533²).

The spelling of 421604063 in words is "four hundred twenty-one million, six hundred four thousand, sixty-three".